2.2 In the diagram, = 40° and = 80°. Calculate the size of AD. B 80° A 40° Statement Reason ACD=40°+ ACD = 2.3 In the diagram below, ABC is a straight line. 2 = 75° and 3 = 55° Determine the size of 75° 2 1 A 3 55 B E Statement B1+75°+55° B₁ =1 Reason sum of 2s on a straight line

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterP: Preliminary Concepts
SectionP.CT: Test
Problem 1CT
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Question

Euclidean geometry

2.2 In the diagram, = 40° and = 80°. Calculate the size of AD.
B
80°
A
40°
Statement
Reason
ACD=40°+
ACD
=
2.3 In the diagram below, ABC is a straight line. 2 = 75° and 3 = 55°
Determine the size of
75°
2
1
A
3
55
B
E
Statement
B1+75°+55°
B₁
=1
Reason
sum of 2s on a straight line
Transcribed Image Text:2.2 In the diagram, = 40° and = 80°. Calculate the size of AD. B 80° A 40° Statement Reason ACD=40°+ ACD = 2.3 In the diagram below, ABC is a straight line. 2 = 75° and 3 = 55° Determine the size of 75° 2 1 A 3 55 B E Statement B1+75°+55° B₁ =1 Reason sum of 2s on a straight line
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